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-rw-r--r--sm/passphrase.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/sm/passphrase.c b/sm/passphrase.c
new file mode 100644
index 0000000..09eac07
--- /dev/null
+++ b/sm/passphrase.c
@@ -0,0 +1,90 @@
+/* passphrase.c - Get a passphrase
+ * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ * 2005, 2006, 2007, 2009, 2011 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <unistd.h>
+
+#include "passphrase.h"
+#include "gpgsm.h"
+#include "../common/shareddefs.h"
+#include "../common/ttyio.h"
+
+static char *fd_passwd = NULL;
+
+int
+have_static_passphrase ()
+{
+ return (!!fd_passwd
+ && (opt.batch || opt.pinentry_mode == PINENTRY_MODE_LOOPBACK));
+}
+
+/* Return a static passphrase. The returned value is only valid as
+ long as no other passphrase related function is called. NULL may
+ be returned if no passphrase has been set; better use
+ have_static_passphrase first. */
+const char *
+get_static_passphrase (void)
+{
+ return fd_passwd;
+}
+
+void
+read_passphrase_from_fd (int fd)
+{
+ int i, len;
+ char *pw;
+
+ if (!opt.batch && opt.pinentry_mode != PINENTRY_MODE_LOOPBACK)
+ { /* Not used but we have to do a dummy read, so that it won't end
+ up at the begin of the message if the quite usual trick to
+ prepend the passphtrase to the message is used. */
+ char buf[1];
+
+ while (!(read (fd, buf, 1) != 1 || *buf == '\n'))
+ ;
+ *buf = 0;
+ return;
+ }
+
+ for (pw = NULL, i = len = 100; ; i++)
+ {
+ if (i >= len-1)
+ {
+ char *pw2 = pw;
+ len += 100;
+ pw = xmalloc_secure (len);
+ if (pw2)
+ {
+ memcpy (pw, pw2, i);
+ xfree (pw2);
+ }
+ else
+ i = 0;
+ }
+ if (read (fd, pw+i, 1) != 1 || pw[i] == '\n')
+ break;
+ }
+ pw[i] = 0;
+ if (!opt.batch && opt.pinentry_mode != PINENTRY_MODE_LOOPBACK)
+ tty_printf("\b\b\b \n" );
+
+ xfree (fd_passwd);
+ fd_passwd = pw;
+}